diff --git a/common/kernel/array2d.h b/common/kernel/array2d.h
index 0498f474..c70de90e 100644
--- a/common/kernel/array2d.h
+++ b/common/kernel/array2d.h
@@ -28,6 +28,7 @@
 #include <vector>
 
 #include "nextpnr_assertions.h"
+#include "nextpnr_base_types.h"
 #include "nextpnr_namespaces.h"
 
 NEXTPNR_NAMESPACE_BEGIN